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<head>
<title>新建网页</title>
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<meta name="description" content="" />
<meta name="keywords" content="" />
<script type="text/javascript">
    var a = 3; // 直角边长
    var b = 4; // 直解边长
    var c = Math.sqrt(Math.pow(3,2) + Math.pow(4,2));
    document.write('斜边C的长为:' + c);
</script>

<style type="text/css">
</style>
</head>
    <body>
    </body>
</html>